code: def create_reference_file(
      self,
      body: str,
      prefix: str = "",
      suffix: str = "",
      fname: str = "reference.py",
  ) -> Iterator[None]:
      try:
          with open(fname, "w") as f:
              if prefix != "":
                  f.write(prefix)
              f.write(body)
              if suffix != "":
                  f.write(suffix)
          yield
      finally:
          os.remove(fname)
  
file_path: spark/python/pyspark/ml/tests/test_dl_util.py
imports: from contextlib import contextmanager
  import os
  import textwrap
  from typing import Any, BinaryIO, Callable, Iterator
  import unittest
  from parameterized import parameterized
  from pyspark import cloudpickle
  from pyspark.ml.dl_util import FunctionPickler
label_desc: Use image node_id 5 for calling the TestFunctionPickler obj's underlying member method code with example usage: obj.create_reference_file(body, prefix, suffix, fname) without return types